CN207730350U - A kind of fexible film pressure sensor - Google Patents
A kind of fexible film pressure sensor Download PDFInfo
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- CN207730350U CN207730350U CN201820058825.2U CN201820058825U CN207730350U CN 207730350 U CN207730350 U CN 207730350U CN 201820058825 U CN201820058825 U CN 201820058825U CN 207730350 U CN207730350 U CN 207730350U
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- pressure sensor
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Abstract
A kind of fexible film pressure sensor, including spaced first resistor carbon film and second resistance carbon film, the resistivity of the second resistance carbon film is less than first resistor carbon film, the first resistor carbon film is connect by conducting wire with external circuit, first resistor carbon film is in contact with second resistance carbon film when sensor is pressurized, change the output resistance of conducting wire, the utility model fexible film pressure sensor can be by being set separately or adjusting the resistivity of first resistor carbon film and second resistance carbon film, to limit the variation range of output resistance, obtain higher sensitivity and more accurate resistance range.
Description
Technical field
The utility model is related to sensor technical fields, more particularly to a kind of fexible film pressure sensor.
Background technology
Sensor technology constitutes three big pillars of modern information industry with the communication technology, computer technology.Wherein, sensor
Technology is the bottleneck industry that a relative communication technology and computer technology fall behind.Traditional sensors are because of function, characteristic, volume etc.
Be difficult to meet the present computer technology, the communication technology to precision, reliability, environment resistance, information processing capability etc. require and by
Gradually it is eliminated.
Diaphragm pressure sensor is with the development of thin film technique and a kind of novel pressure of function admirable for being born sensing
Device uses high-precision printing technology, has the good characteristics such as precision is high, operating temperature range is wide, stability is good.Existing film
Pressure sensor one side is silver paste conductive circuit layer, and another side is resistive formation, and silver paste line layer and resistive formation are each other
Separation.When sensor is pressurized, silver paste line layer is in contact with resistive formation, with the two contact tightness degree increase,
Electric current between the two increases, to change the output resistance of sensor.The sensor of above structure, by changing silver paste circuit
Contact tightness degree of the layer with resistive formation changes output resistance, sensitivity and resistance range by silver paste line layer
The density degree of circuit limits.
Invention content
In view of this, providing a kind of fexible film pressure sensor that can effectively overcome disadvantages mentioned above.
A kind of fexible film pressure sensor, including spaced first resistor carbon film and second resistance carbon film, it is described
The resistivity of second resistance carbon film is less than first resistor carbon film, and the first resistor carbon film is connected by conducting wire and external circuit
It connects, first resistor carbon film is in contact with second resistance carbon film when sensor is pressurized, and changes the output resistance of conducting wire.
Preferably, the first resistor carbon film includes two spaced resistance, the initial resistivity value of first resistor carbon film
Infinity, when second resistance carbon film is in contact with first resistor carbon film, second resistance carbon film electrical communication first resistor carbon film
Two resistance.
Preferably, be provided with spacer between the first resistor carbon film and second resistance carbon film, the spacer is by
One resistance carbon film is bonded with second resistance carbon film, and the center of spacer is formed with trepanning, the trepanning face first resistor carbon film
With second resistance carbon film.
Trepanning is in communication with the outside preferably, the spacer is also formed with fluting.
Preferably, the first resistor carbon film and conducting wire are formed on a sheet material, the second resistance carbon
Film is formed on a film substrate, and the sheet material and film substrate are flexible parent metal.
A kind of fexible film pressure sensor, including the first base material and the conducting wire that is formed in the first base material, institute
State conducting wire include two leads, further include be formed in the first base material and connect with two leads first resistor carbon film,
And the separately positioned second resistance carbon film with first resistor carbon film, the resistivity of the second resistance carbon film are less than first resistor
Carbon film, sensor are deformed when being pressurized, and first resistor carbon film is in contact with second resistance carbon film, change the output electricity of lead
Resistance.
Preferably, spacer is provided between the first resistor carbon film and second resistance carbon film, in the spacer
Centre is formed with trepanning and is connected to trepanning and extraneous fluting, the trepanning face first resistor carbon film and second resistance carbon film.
Trepanning is in communication with the outside preferably, the spacer is also formed with fluting.
Preferably, the first resistor carbon film includes two spaced resistance, two resistance connects with two leads respectively
It connects, the initial resistivity value of first resistor carbon film is infinitely great.
Preferably, the resistance of the first resistor carbon film is en-block construction, both ends are connect with two leads respectively, first resistor
Carbon film has certain initial resistance.
Compared to the prior art, the utility model sensor is according to the contact of first resistor carbon film and i.e. second resistance carbon film
Tightness degree change the output resistance at first resistor carbon film both ends, can by being set separately or adjusting first resistor carbon film
With the resistivity of second resistance carbon film higher sensitivity and more accurately electricity are obtained to limit the variation range of output resistance
Hinder variation range.
Description of the drawings
Fig. 1 is the structural schematic diagram of an embodiment of the utility model fexible film pressure sensor.
Fig. 2 is the explosive view of fexible film pressure sensor shown in Fig. 1.
Fig. 3 is another angular views of the second resistance carbon film of fexible film pressure sensor shown in Fig. 2.
Fig. 4 is the schematic side view of fexible film pressure sensor shown in Fig. 1.
State change schematic diagram when Fig. 5 is the stress of fexible film pressure sensor shown in Fig. 1.
Specific implementation mode
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.One or more embodiments that the utility model is illustratively given in attached drawing, so that disclosed in the utility model
The understanding of technical solution is more accurate, thorough.However, it should be understood that the utility model can be with many different forms
To realize, however it is not limited to embodiments described below.
Fig. 1 and Fig. 2 show a specific embodiment of the utility model fexible film pressure sensor, the fexible film
The conducting wire 20 that pressure sensor includes the first base material 10, is formed in the first base material 10 and first resistor carbon film 30, second
Base material 40, the second resistance carbon film 50 being formed on the second base material 40 and spacer 60.
The first base material 10 is flake, and there is certain elasticity, compression can have certain deformation quantity.Described first
The material of base material 10 is preferably the thin film flexibles material such as PET, PI and/or FR4.In the first base material 10, by printing,
The techniques such as etching, plating and/or spraying form the conducting wire 20, and this will not be repeated here for concrete technology.In the present embodiment,
The conducting wire 20 includes two leads 22, and two leads 22 are separately positioned, each lead 22 have an inner end 24 with
One outer end 26, the inner end 24 of the lead 22 with first resistor carbon film 30 for connecting, and the outer end 26 is then used for and external electrical
Road connects.
The first resistor carbon film 30 is formed in by techniques such as printing, spraying and/or engravings in the first base material 10, and position
Between the inner end 24 of two leads 22.In the present embodiment, the first resistor carbon film 30 includes two resistance.Described two resistance
31 is separately positioned, between be formed with a small interval 32.Described two resistance 31 connect with the inner end 24 of two lead 22 respectively
It connects.When initial, since two resistance 31 are separately positioned, the initial resistivity value of first resistor carbon film 30 is infinitely great.In other embodiments
In, the resistance carbon film 30 can also be en-block construction, and both ends are connect with the inner end 24 of two leads 22 respectively, have one when initial
Fixed resistance value.
As shown in figure 3, second base material 40 is preferably the thin film flexibles materials such as PET, PI and/or FR4.Described second
Resistance carbon film 50 is formed in by techniques such as printing, spraying and/or engravings on the second base material 40.Preferably, the second resistance
Carbon film 50 is second resistance carbon film, and resistivity is much smaller than first resistor carbon film 30.The spacer 60 is heat insulating lamella material,
Two sides is equipped with viscose glue.The trepanning 62 that the center of the spacer 60 is formed through.When assembling, there is viscose glue by two sides
The first base material 10, the second base material 40 are bonded as one by spacer 60, and ensure that the first base material 10 aligns with the second base material 40,
First resistor carbon film 30 is set to be oppositely arranged with second resistance carbon film 50 simultaneously.
After assembling, first resistor carbon film 30, second resistance carbon film 50 are spaced by the spacer 60, and spacer 60 is opened
62 face first resistor carbon film 30 of hole and second resistance carbon film 50.As shown in figure 4, in the first resistor carbon film 30, second
Between resistance carbon film 50, interval 70 is formed in the position of corresponding trepanning 62, to be first resistor carbon film 30 and/or second resistance
Carbon film 50 provides deformation space.Preferably, spacer 60 is also formed with fluting 64 in the present embodiment, the fluting 64 extends transversely through
Spacer 60 is simultaneously connected with trepanning 62, to which the interval 70 is communicated with the outside by fluting 64, it is ensured that first resistor carbon
Influence of the deformation of film 30 and/or second resistance carbon film 50 without draught head.The utility model fexible film pressure sensor makes
Used time, as shown in figure 5, directed force F is applied to the position of the back side face second resistance carbon film 50 of the second base material 40, the second base material
40 and the second resistance carbon film 50 that is formed on the second base material 40 be deformed recessed, be in contact with first resistor carbon film 30.
Directed force F is bigger, and the deformation extent of second resistance carbon film 50 is bigger, bigger with the contact area of first resistor carbon film 30, contact
Closer, the electric current flowed through is bigger, and the resistance value of output is smaller；Otherwise directed force F is smaller, the deformation journey of second resistance carbon film 50
Spend smaller, the electric current flowed through is smaller, and the resistance value of output is bigger.After directed force F removes, second resistance carbon film 50 restores shape
Become, resistance value is restored to initial value, to obtain the correspondence between pressure and resistance.
In above-described embodiment of the utility model fexible film pressure sensor, force acting on transducer makes second resistance carbon film
50 are deformed, and are in contact with first resistor carbon film 30, according to first resistor carbon film 30 (i.e. first resistor carbon film) and the second electricity
The tightness degree of the contact of resistance carbon film 50 (i.e. second resistance carbon film) changes the output resistance at 30 both ends of first resistor carbon film, from
And obtain the correspondence of pressure and resistance.In other embodiments, can also be that active force acts in the first base material 10 and makes
First resistor carbon film 30 generates deformation and is in contact with second resistance carbon film 50, also according to (the i.e. first electricity of first resistor carbon film 30
Resistance carbon film) change 30 liang of first resistor carbon film with the tightness degree of the contact of second resistance carbon film 50 (i.e. second resistance carbon film)
The output resistance at end, to obtain the correspondence of pressure and resistance.The utility model cell pressure resistance characteristic it is linear
More preferably, stability is more preferable, restorative more preferable, longer life expectancy, and product structure is more firm.In addition, the utility model can also pass through
It is set separately or adjusts the resistivity of first resistor carbon film 30 and second resistance carbon film 50, to limit the variation model of output resistance
It encloses, obtains higher sensitivity and more accurate resistance range, to be conducive to signal processing.In addition, the utility model is soft
Property diaphragm pressure sensor contact surface, be the resistance carbon film 30,50 of wear-resisting resistance to oxidation, harsh use environment can be met,
All trades and professions are can be widely applied to, such as pressure sensitive button, pressure sensi-tive pen, pressure monitoring, deformation monitoring, vibration monitoring, intelligence
Insole, pressure threshold switch, counter, vital sign monitoring etc..
It should be noted that the utility model is not limited to the above embodiment, creation essence according to the present utility model
God, those skilled in the art can also make other variations, these variations done according to the creative spirit of the utility model, all
It should be within the scope of the utility model be claimed.
Claims (10)
1. a kind of fexible film pressure sensor, it is characterised in that：Including spaced first resistor carbon film and second resistance
The resistivity of carbon film, the second resistance carbon film is less than first resistor carbon film, and the first resistor carbon film is by conducting wire and outside
Portion's circuit connection, first resistor carbon film is in contact with second resistance carbon film when sensor is pressurized, and changes the output electricity of conducting wire
Resistance.
2. fexible film pressure sensor as described in claim 1, which is characterized in that the first resistor carbon film include two between
Infinitely great every the initial resistivity value of the resistance of setting, first resistor carbon film, second resistance carbon film is in contact with first resistor carbon film
When, two resistance of second resistance carbon film electrical communication first resistor carbon film.
3. fexible film pressure sensor as claimed in claim 2, which is characterized in that the first resistor carbon film and the second electricity
Spacer is provided between resistance carbon film, the spacer bonds first resistor carbon film and second resistance carbon film, in spacer
Centre is formed with trepanning, the trepanning face first resistor carbon film and second resistance carbon film.
4. fexible film pressure sensor as claimed in claim 3, which is characterized in that the spacer is also formed with fluting will
Trepanning is in communication with the outside.
5. fexible film pressure sensor as described in claim 1, which is characterized in that the first resistor carbon film and conduction
Circuit is formed on a sheet material, and the second resistance carbon film is formed on a film substrate, the sheet material and film
Base material is flexible parent metal.
6. a kind of fexible film pressure sensor, including the first base material and the conducting wire that is formed in the first base material, it is described
Conducting wire includes two leads, it is characterised in that：Further include first for being formed in the first base material and being connect with two leads
Resistance carbon film and the second resistance carbon film separately positioned with first resistor carbon film, the resistivity of the second resistance carbon film are small
In first resistor carbon film, sensor is deformed when being pressurized, and first resistor carbon film is in contact with second resistance carbon film, changes lead
Output resistance.
7. fexible film pressure sensor as claimed in claim 6, which is characterized in that the first resistor carbon film and the second electricity
Be provided with spacer between resistance carbon film, the center of the spacer is formed with trepanning, the trepanning face first resistor carbon film with
Second resistance carbon film.
8. fexible film pressure sensor as claimed in claim 7, which is characterized in that the spacer is also formed with fluting will
Trepanning is in communication with the outside.
9. fexible film pressure sensor as claimed in claim 6, which is characterized in that the first resistor carbon film include two between
Every the resistance of setting, two resistance is connect with two leads respectively, and the initial resistivity value of first resistor carbon film is infinitely great.
10. fexible film pressure sensor as claimed in claim 6, which is characterized in that the resistance of the first resistor carbon film
For en-block construction, both ends are connect with two leads respectively, and first resistor carbon film has certain initial resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820058825.2U CN207730350U (en) | 2018-01-12 | 2018-01-12 | A kind of fexible film pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820058825.2U CN207730350U (en) | 2018-01-12 | 2018-01-12 | A kind of fexible film pressure sensor |
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| Publication Number | Publication Date |
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| CN207730350U true CN207730350U (en) | 2018-08-14 |
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| CN201820058825.2U Active CN207730350U (en) | 2018-01-12 | 2018-01-12 | A kind of fexible film pressure sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323372A (en) * | 2021-12-28 | 2022-04-12 | 浙江工业大学 | Resistance type flexible pressure sensing unit, sensor and preparation method |
-
2018
- 2018-01-12 CN CN201820058825.2U patent/CN207730350U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323372A (en) * | 2021-12-28 | 2022-04-12 | 浙江工业大学 | Resistance type flexible pressure sensing unit, sensor and preparation method |
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